CVE-2021-31962: Microsoft Windows 10

Critical severity, CVSS 9.4. EPSS: 3.8% chance of exploitation in the next 30 days.

Kerberos AppContainer Security Feature Bypass Vulnerability

Affected products

• Microsoft Windows 10: affected versions not specified; version 20h2 only; version 21h1 only; version 1607 only; version 1809 only; version 1909 only; …
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Rt 8.1: affected versions not specified
• Microsoft Windows Server 2008: version r2 only; version sp2 only
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: affected versions not specified; version 20h2 only; version 2004 only
• Microsoft Windows Server 2019: affected versions not specified

Published 2021-06-08. Last modified 2026-06-17.